Senior Tier III Network Engineer – TS/SCI

Footbridge Federal; Centreville (VA); Hybrid; USD 150,000 - 190,000; Full time

Job summary

Footbridge Federal in Centreville, VA seeks a senior network engineer with active TS/SCI clearance to lead complex troubleshooting, configure Cisco and Juniper routers and switches, and manage boundary protection platforms for defense programs. You will also analyze traffic and optimize topology, document procedures, and support COMSEC duties as needed.

The role requires hands-on routing, VPNs, MPLS, ITSM familiarity, and the ability to work occasional after-hours on-call.

Qualifications

• Active TS/SCI with CI Polygraph clearance required.
• Minimum 12 years of experience with a Bachelor's degree, 14 with an Associate's, or 16 with a High School diploma.
• Hands-on experience configuring/troubleshooting Cisco and Juniper routers and switches.
• Expertise with boundary protection platforms (Palo Alto, Cisco ASA, Forcepoint).
• Deep understanding of IP networking, NAT, VPNs, and routing protocols (OSPF, BGP, MPLS).
• Familiarity with ITSM platforms such as ServiceNow; MS Office and Visio for diagrams.

Responsibilities

• Perform Tier III troubleshooting to isolate and resolve complex network faults.
• Administer routing and switching configurations using OSPF, BGP, VRFs, and MPLS.
• Manage firewall rulesets and boundary security policies for secure connectivity.
• Analyze network traffic, throughput, and performance metrics; suggest topology optimizations.
• Create and update technical documentation, troubleshooting guides, and schematics.
• Support COMSEC duties (up to 10%); assist with configuration management.

Skills

Clearance TS/SCI with CI Polygraph

Experience 12y+

Cisco & Juniper routers and switches

Boundary protection platforms

IP networking

Subnetting

NAT

VPNs

OSPF

BGP/MPLS

ITSM (ServiceNow)

MS Office

Education

Bachelor's degree

Associate's degree

High School diploma

Tools

Visio

ServiceNow

Job description

Footbridge Federal in Centreville, VA seeks a senior network engineer with active TS/SCI clearance to lead complex troubleshooting, configure Cisco and Juniper routers and switches, and manage boundary protection platforms for defense programs. You will also analyze traffic and optimize topology, document procedures, and support COMSEC duties as needed.

The role requires hands-on routing, VPNs, MPLS, ITSM familiarity, and the ability to work occasional after-hours on-call.